How much total compensation could Altman have gotten from another company, if not for this slander? Yeah no one knows for sure, but how much could he argue? He's a princeling of Silicon Valley, and just led a company from $0 to $90 billion dollars. I'm guessing that's going to be a very, very big number.
Unless OpenAI can prove in a court of law that what they said was true, they're on the hook for that amount in compensation, perhaps plus punitive damages and legal costs.